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Reorganization and Business Transformation - Costs Incurred For Reorganization Plan (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
2020 Restructuring Plan |
Restructuring Cost and Reserve [Line Items] |
Expense accruals | $ 38
Cash payments | (20)
Restructuring reserve. ending balance | 18
VSP |
Restructuring Cost and Reserve [Line Items] |
Expense accruals | 23
Cash payments | (7)
Restructuring reserve. ending balance | 16
Workforce Reduction Plan | Employee severance and other employee-related costs |
Restructuring Cost and Reserve [Line Items] |
Expense accruals | 9
Cash payments | (7)
Restructuring reserve. ending balance | 2
Workforce Reduction Plan | Facilities lease related costs, outside service, legal and other associated costs |
Restructuring Cost and Reserve [Line Items] |
Expense accruals | 6
Cash payments | (6)
Restructuring reserve. ending balance | $ 0

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